@inproceedings{zezschwitz2013IUI,
 author = {von Zezschwitz, Emanuel and Koslow, Anton and De Luca, Alexander and Hussmann, Heinrich},
 title = {Making graphic-based authentication secure against smudge attacks},
 booktitle = {Proceedings of the 2013 international conference on Intelligent user interfaces},
 series = {IUI '13},
 year = {2013},
 isbn = {978-1-4503-1965-2},
 location = {Santa Monica, California, USA},
 pages = {277--286},
 numpages = {10},
 url = {http://doi.acm.org/10.1145/2449396.2449432},
 doi = {10.1145/2449396.2449432},
 acmid = {2449432},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {attacks, authentication, mobile, security, smudge},
}